Valve-making machine



Feb. 24, 1931. L. c. BROECKER VALVE MAKING MACHINE Filed Aug. '7, 1928 4Sheets-Sheet 1 INVENTOR LEWHS C.BROE'QKER.,

ATTORNEYS.

Feb. 24, 1931. I c, BRQECKER I 1,794,143

VALVE MAKING MACHINE Filed Aug. 7, 192a 4sne'ets-sheet 2 INVENTOR. LEWISC BROEQKER.

A TTORNEYJ,

Feb. 24, 1931. L. c. BROECKER 1,794,143

VALVE MAKING MACHINE Filed Aug. 7', 1928 4 Sheets-Sheet 3 I INVENTOR.Law/s 0.52050 mm,

BY 3%WZW Feb. 24, 1931. L. c; BROECKER VALVE MAKING MACH INE 4Sheets-Sheet 4 Filed Aug. 7, 192a w a my y w z H W m 7/%//// I.

\\I III [I A TTORNEYJ.

Patented Feb. 24, 1931 UNITED STATES PATENT OFFICE LEWIS C. BROECKER, OFAKRON, OHIO, ASSIGNOR TO THE FIRESTONE STEEL PRODUCTS COMPANY, OF AKRON,OHIO, A CORPORATION OF OHIO VALVE-MAKING MACHINE Application filedAugust 7,

the stem and stamping a name on the flat side.

machine for effectively and efficiently carrying out the aboveoperations without the intervention of a human agency.

The foregoing and other objects are obtained by the device illustratedin the accompanying drawings and described below. It is to be understoodthat the device is not limited to the specific form thereof disclosedherein.

Of the accompanying drawings, I

Figure 1 is a front elevation of a machine embodying the principles ofthe invention;

Figure 2 is a side elevation thereof;

Figure 3 is an enlarged scale detailed plan of the table portion of theapparatus;

Figure 4 is an enlarged scale front elevation thereof;

Figure 5 is an enlarged scale side elevation thereof;

Figure 6 is a still further enlarged scale: vertical sectional detail ofthe valve seat up setting operation;

Figure '7 is a vertical sectional detail of the valve stem shearingoperation;

Figure 8 is a plan detail of the stamping operation;

Figure 9 is an end 'elevation'al detail there- .of; and

ated by crank 13 which is rotated by motor 14 through suitable reductiongears. Projecting from the lower end of crosshead12 is a vertical shaft15 carrying a bracket 16 to be reciprocated by the crosshead. One sideof the bracket carries an arcuately disposed an air jet 23. The objectof the invention is to devise a 1928; Serial No. 298,108.

series of devices, namely, an air jet 17, a depth-sounding tool 18, seatupsetting punches 19 and 20, and a final seat-shaping punch 21. Theother side of the bracket carries an elongated shearing punch 22 and Atable 24 supported on frame 10 vertically below crosshead 12 carriesthereon an indexing Wheel 25 having a series of equidistantly spacednotches about its outer periphery. The wheel 25 preferably carries acorrespondingly notched hardened steel plate 26 about its upper rim forsupporting the base flanges 27 of valve stems 28 placed in the notch-es29 of the indexing wheel. As wheel 25 is rotated the valve stems aremaintained in the notches by means of a guard band 30. An arcuatebracket 31'is' formed with a series of apertures 32 having hardenedbushings 33 provided therein for respectively aligning the devices 18,19, 20 and QIWi-t'h valve stems carried in notches 29 of the indexingwheel. A spring-pressed finger 34 is attached to bracket 31 for ejectingeach valve stem from its notch as it passes from the punching operation.v

The indexing wheel is periodically rotated through an are equal to thedistance between the notches by means of an arm 35 reciprocated by cam36 mounted on shaft 37 and rotated from the shaft of crank 13 throughbevelled gears 38. One end of arm 35 is forcibly held against cam 36 byspring-pressed block 39 and the other end of the arm is pro vided with apin 10 engageable successively in notches 29 and yieldingly held thereinby 43 carried on arm 35. Pin 40 is maintained in notch 29 during theforward movement of arm 35 to rotate Wheel 25 in the direction shown inthe arrow in Figure 3. Upon the backward movement of arm 35 the wheel isheld against rotation by the punches which are then in their downwardposition and the end of the arm carrying pin 40 is moved radially awayfrom wheel 25 in order to disengage pin 40 from the notch 29, thismovement being, eflected by a lever 44 operated by lever 45 which isengaged by arm 46 in turn oscillated by connecting rod l? which isreciprocated by crank 18 affixed to shaft 3'5. Arm-35 is guided andaligned by means of a guide block 49.

Positioned on table 10 vertically below shearing punch 22 is support 50carrying a pair of shear plates '51 cooperating with punch 22 to shearside on the valve stems. The latter are pro erly positionedon )lates 51after dropping from the indexin l. l u; t1

wheel, by means of a reciprocable forked member 52 sliding across plates51 and engeable with the base flange 2'? the in ve stem as shown indetail in Figure 10.

the valve stem is positioned. on plates 51 with its base flange inabutment with a stop 53 and before sh *lCll 2:2 descends, member 52 isretracted, member being actuated by arm 4 6 reciprocated by connectingrod 47 as mentioned above.

Chips formed by thepunching operation are blown from the apparatus bymeans of air jet 28 connected to air alve 5 1 by means of flexible hoseand whose operation is timed by cam 56 affixed to shaft 37. A pair ofoppositely, rotatable circulardies 51 and.

58 are mounted below the shearing mechannism and are adapted toengagethe valve stem that has been forced through shear plates 51 into a guideblock and between dies 5'? and 58. The latter are rotated from shaft 37through gears 60, 61, 62, 63 and 64: and are timed so that letters ornumbers 65 embossed on the'dies will pass across the llat surface of thevalve stem, stamping the same and ejecting the stem from the apparatus.

Depth-sounding tool 18 is reciprocably mounted in bracket 16 andyieldingly neld in its downward position. It serves as a safety deviceand in the event that the bore of valve stem 28 is not deeply enoughdrilled, depthsounding tool 18 will be forced upwardly with respect tobracket 16 and-will operate. electrical contactswitch 66 to closecircuit and energize solenoid 67 releasing a springpressed latch 68 foroperating clutch rod 69 to stop the operation of the machine. Thus punch19 is safeguarded against damage by being forced into a valve stem whichhas been accidentally given too shallow a bore. Furthermore, anyobstruction in the here will. operate tool 18 to stop the machine. Ahand lever 70 mounted on the front portion of table 2% is also adaptedto operate suitable contacts for energizing the solenoid to stop themachine, only a slight touch by the operator being necessary to actuatelever TO. An in clined trough-like guide 71 serves as a gravity conveyorfor feeding valve stems to the indexing wheel and also serves as a meansfor holding a number of valve stems in reserve to be operated upon bythe machine. This guide has been removed from Figures 1 and in order notto obscure the construction of After 1 the mechanism appearing behindthe same.

In the operation of the machine a number of partly finished valve stemsformed with external threads and with a bore having a shoulder adjacentone end thereof, are placed in guide 71and are automaticallysuccessively positioned in notches 29 as the index wheel is periodicallyrotated. As a valve stem comes into position under air jet 1?, crosshead12 descends and forces bracket 16 downwardly to seal'air jet 1'? againstthe base flange of the valve stem and a blast of air is forced throughthe bore of the valve stem to blow out any chips that may have lodgedtherein. As

wheel 26 is again indexed the valve stem is brought beneathdepth-sounding tool 18 which is then inserted into the bore to test thedepth of the shoulder. If the depth of the bore tothe shoulder istooshallow or islobstructed, tool 18 will trip electrical contacts 66 tostop the machine, but if the bore is of sutlicient.v depth the operationcontinues. Upon the next indexing operation the valve stem is broughtunder punch 19 which is then forced downwardly to partially upset a seatin the bore of the valve stem. After punch 19 is retracted by the upwardmovement of the crosshead the, wheel is again indexed and punch 20 isforcedinto. the bore of the stem to further upset the seat. .Theoperation of forming the seat is best illustrated in Figure 6 of thedrawings. Then wheel 26 is agaln indexed-and the next stroke of bracket16 forces punch 21 into the bore for the linal force the valve stemthrough plates 50 shear- 7 ing ed a flat surface on-each side of thevalve stem and forcmg the stem downwardly between and into engagementwith circular dies 57 and 58. I As the dies rotate and stamp a name,number of other indicia upon the fiat side of the valve stem the latteris projected from the machine. and drops into a sultable container (notshown).

Modifications of the invention may be re-f sorted to Without departingfrom the spirit thereof or the scope of the appended claims.

What is claimed is: i

1. In a valve making machine, a rotatable indexing wheel formed withaseries of equally spaced notches about its outer periphery, means forintermittently rotating said wheel through a distance equal to the spacehetween said notches, means for feeding a series of valve stemssuccessively into said notches as said Wheel is rotated, a series oftools adapted to perform successive operations upon the series of valvestems, said tools being positioned to be aligned with successive valvestems as said Wheel is rotated, a shear ing punch and a pair of shearplates cooperating to form a flat side on said valve stems, means forsuccessively removing the valve stems from said indexing Wheel andpositioning same upon said shear plates, and a pair of rotatablestamping dies mounted below said plates for stampin indicia upon theflat side of a valve stem after the latter is forced through the shearplates by the shearing punch.

nation of a pair of shear plates, means for successively feeding andpositioning valve stems on said shear plates, a reciprocable shearingpunch for forcing said valve stems through the shear plates to formflattened sides on the valve stems, and a pair of rotatable stampingdies positioned below said,

shear plates and adapted successively to engage the fiattened sides ofthe valve stemsas the latter are forced through the plate by theshearing punch.

3. In a machine for making valve stems, a reciprocable punch forengaging a shoulder formed in the bore of said valve stems for upsettingthe metal thereof to form a valve seat, and a safety device for stoppingsaid machine if the bore of said valve stem is too small or too shallow,said safety device including a spring-pressed rod adapted to be insertedin the bore of said valve stem in advance of the punching operation andelectrical means for stopping the machine if the rod does not project toa sufhcient depth Within the bore.

4. A valve stem finishing machine comprising in combination, means forsuccessively cleaning the bores of a series of valve stems, means fortesting the depth of the bore of each valve stem, means for upsetting avalve seat Within said bore, means for forming a fiat side on theexterior of said valve stem, means for stamping indicia upon said flatside, means for conveying the valve stems into successive operativepositions for the operation of each of the above-mentioned means, andmeans for simultaneously operating each of the abovementioned means.

5. A valve stem finishing machine comprising in combination, means forsuccessively cleaning the cores of a series of valve stems, means forupsetting a valve seat Within said bore, means for forming a flat sideon the exterior of said valve stem, means for stamping indicia upon saidfiat side, means for conveying the valve stems into successive operativepositions for the operation of each of the above-mentioned means, andmeans for sifed into said machine, means for upsetting a valve seatWithin said bore, means for formmg a fiat sideaon the exterior of saidvalve stem, means for stamping indicia upon said 2. In a valve makingmachine, the comblfiat side, means for conveying the valve stems intosuccessive operative positions for the operation of each of theabove-mentioned means, and means for simultaneously operating each ofthe above-mentioned means.

8. A valve stem finishing machine comprising in combination, means forvupsetting a valve seat Within the bore of a series of valve stems fedinto the machine, means for forming a flat side on the exterior of saidvalve stem, means for stamping indicia upon said flat side, means forconveying the valve stems into successive operative positions for theoperation of each of the above-mentioned means,

and means for simultaneously operating each of the above-mentionedmeans.

In Witness whereof I have hereunto affixed my signature this 16th day ofJuly, 1928.

LEl/VIS C. BROECKER.

